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Effect of Stator Surface Area on Braking Torque and Wall Heat Dissipation of Magnetorheological Fluid Retarder
Technical Paper
2020-01-0937
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
Magnetorheological fluid (MRF) is used as the transmission medium of the hydraulic retarder. The rheological properties are regulated by changing the magnetic field to achieve accurate control of the retarder's braking torque. Under the action of the external magnetic field, the flow structure and performance of the MRF retarder will be changed in a short time. The apparent viscosity coefficient increases by several orders of magnitude, the fluidity deteriorates and the heat generated by the brake cannot be transferred through the liquid circulation, which will affect the braking torque of the retarder. Changing the surface area of the stator also has an influence on the braking torque of the retarder and the wall heat dissipation. In this study, the relationship between the braking torque of the MRF retarder and the stator surface area of the retarder was analyzed. In addition, phase change materials were used to directly dissipate heat on the retarder surface to improve the heat dissipation rate of retarder and improve the stability of the retarder's braking torque. In order to study the effect of stator radius on braking torque of MRF retarder under an external magnetic field, a braking torque model was established based on MRF with Bingham model properties, and a heat transfer model of wall phase change material was established to analyze the relationship between heat transfer and braking torque of MRF retarder. The results show that the braking torque of the MRF retarder increases rapidly with the increase of the radius outside the effective working area of MRF, which increases faster at high speed and increases the stator wall surface heat dissipation, but the rate of heat dissipation increases relatively slowly. The wall surface with a heat pipe can take away the heat generated by the retarder and cool the retarder. Under the appropriate stator surface conditions, phase change materials are used on the wall surface of the retarder to dissipate heat, which improves the stability of the braking torque of the retarder and promotes the development of MRF retarder to high power.
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Liu, Z., Tan, G., Tian, Z., Zhou, M. et al., "Effect of Stator Surface Area on Braking Torque and Wall Heat Dissipation of Magnetorheological Fluid Retarder," SAE Technical Paper 2020-01-0937, 2020, https://doi.org/10.4271/2020-01-0937.Data Sets - Support Documents
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References
- Schreck , H. , Kucher , H. , and Reisch , B. 1992 10.4271/922452
- Mei , B. , Guo , X. , Yang , B. , Xiong , S. et al. Study on the Effects of Magnetic Field on Magnetorheological Fluid Hydraulic Retarder Braking Torque SAE Technical Paper 2017-01-2503 2017 https://doi.org/10.4271/2017-01-2503
- Cheng , H. 2012
- Guo , H. , Wu , Y. , Lu , D. , Fujimoto , M. , and Nomura , M. Effects of Pressure and Shear Stress on Material Removal Rate in Ultra-Fine Polishing of Optical Glass with Magnetic Compound Fluid Slurry J Mater Process Tech 214 11 2759 2769 2014 10.1016/j.jmatprotec.2014.06.014
- Huang , J. , Peng , Z. , Ou , P. , Zhang , S. et al. Research on the Influence of Circulating Circle's Diameter on Brake Performance of Hydraulic Retarder Agricultural Equipment & Vehicle Engineering 57 05 17 19 2019 10.3969/j.issn.1673-3142.2019.05.005
- Huang , J. , Li , C. , Tong , J. , Wen , W. et al. Study on Pivotal Factors Influencing Breaking Torque of Hydrodynamic Retarder Machine Tool & Hydraulics 38 15 77 80 2010 10.3969/j.issn.1001-3881.2010.15.025
- Xiong , S. , Tan , G. , Yang , B. , Xiao , L. et al. Effect of Temperature on Braking Efficiency Stability of Magnetorheological Fluid Auxiliary Braking Devices SAE Technical Paper 2017-01-2510 2017 https://doi.org/10.4271/2017-01-2510
- Wang , C. 2015
- He , E. , Xiao , B. , and Li , X. Study on Phase Transition Fluid Cooling Technology for Electronic Equipment Electro-Mechanical Engineering 33 06 40 42 2017 10.3969/j.issn.1673-3142.2019.05.005
- Huang , S. , Tan , G. , Wang , Y. , Kuang , J. et al. Analysis of Passive Low Power Phase Change Heat Dissipation Method for Electric Vehicle Motor SAE Technical Paper 2019-01-1256 2019 https://doi.org/10.4271/2019-01-1256
- Mei , B. 2018
- Wang , Y. 2018
- Incropera , F.P. , Dewitt , D.P. , Berbman , T.L. et al. Fundamentals of Heat and Mass Transfer (Sixth Edition) Ge , X. Ye , H. Beijing Chemical Industry Press 2016
- Yang , S. and Tao , W. Heat Transfer (Fourth Edition) Beijing Higher Education Press 2006
- Cao , J. 2019